$(
	function()
	{
		// set up rollover mainmenu
		$("img.rollover").hover(
			function() {	this.src = this.src.replace("_off","_on");	},
			function() {	this.src = this.src.replace("_on","_off");	}
		);
		
		// set rollover map
		$("img.rollover_map").hover(
			function() {	this.src = this.src.replace("off_","on_");	},
			function() {	this.src = this.src.replace("on_","off_");	}
		);
		
		// set up rollover mainmenu-aufklapp-navi #mainnavi li UL.subnavi LI .active
		$("ul.subnavi li").hover(
			function() {	$(this).addClass("active");	},
			function() {	$(this).removeClass("active");	}
		);
		
		// set up rollover submenu
		$("td.sub").hover(
			function() {	$(this).addClass("active");	},
			function() {	$(this).removeClass("active");	}
		);
	}
)